Air-admitting device for underfeed retorts.



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' im ifea-5m notabili- ROBERT S. RILEY, OF WORCESTER, MASSACHUSETTS, ASSIGNOR- TO SANFGBD RILEY STOKE?. CQ., LTD., 0F CHUSETLJ.

CORPORATION 0l? MASSA- AIR-ADMITTING DEVICE FOR UNDERFEED RETORTS.

Specification of Letters Patent,

Llatented 29. i918.

Application nler August :27. 1915. Serial No. 47,594.

'Bilan'. a citizen of the United States. residing' at ll'lorcester. in the county ot' lYoieester and State of lllassaehusetts, have invented a new and useful Air-.lldlnittine' Device for Underfeed letorts, ot' which the following is a specilieation.

This invention relates to the type ot underfeed stoliers represented in in v prior Patent No. 1.090,651, granted March 17, 1914; This is the type of underteial stoliers Ain which the fuel is fed from below through the retort longitudinally.v

' rlhe p i'ineipal objects of this invention are to provide nieans for overcoming the didicult;v which has sometimes been experienced in this type of Stoker. due to the tact that when the air is supplied only at the edges of a retort, there is a tendency for the tire to concentrate along the lines adjacent. the retort-s; to provide a more even distribution of the air throughout. the fuel all along the retort and clear across tl sai e. thus assuring more perfecty om Lihution thereof. and also to dispense with. the necessity of the lateral openings around the sides of the retort, as heretofore used.

Reference is to be had to the accompanying drawings which Show No retorts and in which,

Figure l s tien of a Stoker constructed with this inve` Fig. 2 i.; a pian of the saine part of the stelrer with parts in section; and

fl is a sectional perspective View on the line of Fig. 2.

The invention is shown as applied to a Stoker in Wl ich a number of retorts are loy cated .side by side each comprising; reciprocahle sides ll support-ing the crates and also lia side platesl passing,r through the front. wall and extending inivardljr therefrom under a top plate 13 in the front, Wall and over a bottoni plate 1l eoextensive with the side plates. Through the openings thus formed the fuel is introduced by any desired means such tor example as shown in my above mentioned patent.

nstead of the air conducting means shown in said patent, which conducts the air into the ituel freni the upper parc of the sides l of the fuel conducting passage is a longitudinal ection of a. porin accordance eonstitutii'ig the retort, air is .introduced front below hv the. tollon'inav fnerlianism. lt, will he understood. ot course. that the spare helen' the retort is r-onnecteil with a blower not -shown which is i' nected li'v a suitable suppl): conduit 2l nn the Siy under the retv dien torero fl used. the air is forced through this; s., hv the l lo\\'ei up into a series oli conduits 223 each of which consists ol a nollon' n'edee or keel and extends longitudinall;v7 along; the center of a retort. These conduits are. shown in the torni ot' castings. each having' a Series ot integral hars 2l aero s the saaie. Tliev are secured in position hy means ot' lioolis hooking over the hars 2l and secured hv cross plates 2U on the hottoniol" the bottoni plate ll. ln this ivav the conduit. is capahle ot heinel instantly applied and .secured rninlv in position and yet can he taken out n repairs or replacement n'ilh verfv little diieuzijv'. i

Vlie conduit is provided in its upper half 1with pertcu'ations 27 (intendingT through the inclined part ot the walls thereof and the liottoin plate is provided with openings through which the air is adapted toparss troni the space helen' into each conduit. lt will he understood that this conduit extends longitudinally alone the retort and is centrally arranged thm-ein. but` that it vedgeshaped in order to acconunmlate the slope ot the hurnine; titel at the top of the retort. For this reason the uieningrs QT at the loiver or rear end oit the ronduiternend throne-ii the n'alle ol' the saine troni the bottoni to the top out V1t th.`f upper end they are located only al the top. ln this Way the air is iut-rodueed into the Yluel `inst under the surface which exposed and issues laterallj.' so ae to extend toward hotli side Walls ot the retort which ari closed and do not admit air to the` Jfuel. lu this nav the air is distributed across the retort and insures perfect distribution through all the fuel therein. 'With this construction, a lire cannot concentrate aloner the lines het-Ween adjacent retorts. Furthermore, on account ot the shape of the ronduit. it. does not materiali;7 interfere with the forcing of the tuel along the retort although itY extends up into it nearly to the surface oil the fuel.

Although l have illustrated and described a forced draft furnace, it will he understood (itl i that this invention is capable of "t n a ithout departing' from the Scope of the invention as expressed in the claims. There- Vlore. I do not wish to be limited in this respect. but what l (lo Clainl is l. In an underleed stolier, the combination with the movable Closed sides of a retort between Vwhich the t'u'el is adapted to be ted longitudiuall),Y and out the end thereof,`

of means loeatedin the center of the retort eentrall y in alinement with the course ot' the t'uel and extending;- up from the bottom thereotl substantially to the tops of lvsaid sides tor introducing' air into the center o'l' the retort substantially throughout the length thereofl and at a plurality of elevations and discharging it laterally across the retort from the center and through substantially the entire body of fuel therein.

In an under-feed stoker, the Combination of a retort having sides providing between them a longitudinal passage for fel nally therein and having a and grates supported on said sides, with a hollow conduit extending up into said passage from its bottom so as to divide the entire body of fuel in the passage intoltwo separate streams and having openings in its opposite sides near the top thereof but below the normal level of the grates for discharging,r air into the fuel in the retort, and means for conducting air into said conduit from, below the retort.

3. In an underfeed stoker, the combina tion with a retort along which the fuel is fed longitudinally, of a centrally disposed Wedge-shaped air conduit located longitudislanting upper edge extending downwardly from its front end to the bottom of the rear end of the retort and provided with upwardly converging side Walls at the top perforated to the Hoor level of the retort at the rear end thereof to admit air into the center of the body of vfuel in the retort.

.ln testimony whereof I have hereunto set my hand, in the presence of two subscribing Witnesses.

ROBERT S. RILEY. Witnesses I. A. TAYLOR, F. W. GILMAN. 

